Quadratic Formula

The Quadratic formula is used to solve for the X-intercepts, also known as solutions, zeros, answers, and roots.

Quadratic formulas are everywhere

Everything from the arc of a rainbow off on the horizon, to a cannon firing a round through the air and even a dolphin leaping over the surface of water.

If the cannon shoots a projectile when it's 15 feet off of the ground and the parabolic flight path is modeled by h = 1t^2-8t+15, what is the amount of time in seconds until the cannonball hits the ground?